Control apparatus for automatic transmission mechanism
US8753249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2013 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Jan 21, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control apparatus for an automatic transmission mechanism including a continuously variable transmission having a drive pulley, a driven pulley, and a belt extending around the two pulleys. When beginning of the start of a drive source for driving a vehicle has been detected, a first command oil pressure as a command value of a first control oil pressure supplied to a cylinder chamber of the drive pulley is set to a first predetermined oil pressure substantially equal to 0, and a second command oil pressure as a command value of a second control pressure supplied to a cylinder chamber of the driven pulley is set to a second predetermined oil pressure higher than the first predetermined oil pressure. When the detected second control oil pressure has reached a predetermined threshold value, it is determined that filling of the cylinder chamber of the driven pulley has been completed. A control for increasing the first command oil pressure is performed from a time point when completion of the filling of the cylinder chamber of the driven pulley has been determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.